/** * Initialize a query builder to perform a SUM query on the database * * @param string $table The table name * @param string $field The field name to find sum * @param string $alias The optional field alias; defaults to "sum" * * @return object QueryBuilder */ function db_sum($table, $field, $alias = null) { $qb = new QueryBuilder($table); return $qb->sum($field, $alias ? $alias : 'sum'); }